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17. DO’s & DONT’s
DO’s
•
Keep suction discharge hose assembly and liq-
uid line capped until right before assembly of
joint.
•
Ensure that protective sleeves are in proper lo-
cation where specified
•
Lubricate all pre-installed O-rings with specified
refrigerant mineral oil (Reference assembly in-
structions) prior to assembly of joints.
Prelubricated, preinstalled O-rings do not require
lubrication prior to installation unless the oil has
absorbed into the O-ring and the surface is dry.
•
Seat O-ring in its female cavity prior to hand
starting and torqueing joint nuts.
•
Seat male end form with O-ring in its female cav-
ity prior to torqueing the mini block-fitting joint.
•
Use two wrenches for making each refrigerant
joint connection - a calibrated torque wrench on
the nut and a backup wrench on the mating nut
or a block fitting wrench on the block.
•
Clip or secure hoses and lines as specified.
•
Be sure caps are tight on access valves. To in-
sure tightness, screw caps down until cap seal
contacts valve housing and then give it ¼ to ½
turn more.
•
Assemble dual O-ring fitting joints as follows:
a. Oil bore with a specified oiling tool using
POE oil.
b. Do not oil O-rings.
c. Align end forms and then push together
completely.
d. Tighten joint to specified torque using a
backup wrench.
•
Rotate stock on a first-in first-out basis.
•
Finger start all mounting bolts that thread into
compressor or brackets. Also, finger start the
bolt securing the block fitting on the suction dis-
charge hose assembly to the compressor.
•
DO: Oil O-rings with POE oil prior to assembling
a refrigerant joint. Pre-oiled O-rings do not re-
quire oiling unless the oil has been absorbed into
the O-ring and the surface is dry.
•
DO: Use specified POERL68 oil to lubricate O-
rings (Reference assembly instructions)
DO: Use correct refrigerant O-rings in the vehicle
refrigerant system. (Refer to assembly instructions
for part numbers).
DON’TS
•
Make connections with bends, kinks, or obstruc-
tions in lines.
•
Use bolt or nut to “walk” manifold block or mini
block into it’s mating part. Proper technique is
with O-ring in seat, push blocks together trap-
ping seal washer before running up and
tightening the fastener.
•
Allow hoses and lines to rub against adjacent
parts.
•
Bend metal lines to ease assembly. Do not use
lines as a handle to lift the compressor or con-
denser.
•
Use lines contaminated with water.
•
Allow hoses and lines to directly contact sheet
metal or touch hot engine components.
•
Use bent twisted, kinked or damaged hoses and
lines.
•
Combine refrigerant joint assembly operations
with “dirty” operations such as gritty brackets,
oily suspension components, etc.
•
Process “broken” operations where one operator
loosely assembles a joint and a subsequent op-
erator tightens the joint to required torque.
•
Use PAG oil to lubricate O-rings.
•
Lubricate seal washers prior to attaching refrig-
erant lines to components.
•
Use PAG lubricant to lubricate O-rings.